Separable core for concrete work.



E. N. GOODLETT &1. B. eoonwm. SEPAR ABLE CORE FOR CONCRETE WORK-APPLICATION F |LED JULY 25.1916.

Patented Jan. 14, 1919.

EDGAR N.

GOODLETT, 0F LOS ANGELES, AND JOHN B. G OODWIN,

0F LONG BEACH,

CALIFORNIA.

SEPARABLE CORE FOR CONCRETE WORK.

Specification of Letters Patent.

Patented Jan. 14,1919.

Application filed July 25, 1916. Serial No. 111,242.

To all whom it may concern:

Be it known that we, EDGAR N. Goonnnr'r, a citizen of the United States,and a resident of the city of Los Angeles, county of Los Angeles, Stateof California, and JOHN B. Goonwm, a citizen of the United States,residing in the city of Long Beach, county of Los Angeles, State ofCalifornia, have jointly invented a new and useful inventionto wit,Separable Cores for Concrete Work, of which the following is aspecification.

The invention relates in its present embodiment particularly to coresfor forming recesses in concrete railway ties, among the objects of theinvention are to form a core that may readily be removed from'theconcrete mass when the latter has set avoiding the danger of the corebecoming permanently embedded in the concrete. Also permitting theremoval of the core with the minimum amount of disturbance endangeringthe integrity of the concrete mass be fore crystallization is complete.

In the specification and the annexed drawings we illustrate theinvention in the form that we consider the best, but it is to beunderstood that we do not limit ourselves to such form because the saidinvention may be embodied in other forms, it is also to be understoodthat in and by the claims following the description we desire to coverthe invention in whatever form it may be embodied.

In the accompanying one sheet of drawmgs:

Figure 1 is a perspective view from be- .neath of a separable coreconstructed and assembled in accordance with this invention.

Fig. 2 is a similar view from above of the same.

Fig. 3 is a fragmentary illustrating the manner of rious parts of thecore.

Fig. 4 is a further enlarged fragmentary detail of the same.

It is common practice in forming recesses enlarged detail joining thevathe desired contour, of wood, metal or any other suitable material,hollow or solid according to conditions. This form of core is subject tothe disadvantage that the shrinkage of the concrete mass incrystallizing is apt to bind the core in the'mass, 1n such a present themaximum manner that it must be forcibly driven out, endangering theintegrity of the concrete in the act of dislodging the core by thismethod. he present invention contemplates formlng the core of a numberof interlocking parts so constructed and combined that they resistanceagainst pressure or distortion when assembled, yet may be easilydisassembled inwardly, for the purpose of removing the core in partsfrom the recess formed thereby in the concrete mass.

In detail the structure illustrated in the drawings includes: the endsections alike in construction and comprising the plane 1 tapering fromthe base 2 to the shoulder line 3. The shoulderd is offset at an angleto the plane 1 and joins the uprising plane 5 tapering away from theshoulder 4E. The lateral edges of the plane 1 are bent at an angle tothe plane at the point 6 and terminate in a loop 7 (see Fig. 4:). Thelateral edges of the plane 5 are bent at an angle thereto terminating inthe flanges 8 (see Fig. The lower edges of the base of the plane 2 arebent inwardly as at 9 to add rigidity to the plane and'to form a smoothedge at this point;

The side sections are alike in construction and comprise the main plane10 tapering from the base line 11 to the shoulder line 12 andterminating in the flange 18 forming a continuation of the shoulderlwhich they overlie at the ends. The lateral edges of the main plane 10are turned inwardly parallel with the plane and terminate in the flanges14 (see Fig. 4). These flanges 14 lie within the loop 7 formed on thelateral edges of the end sections 1, with which they form a lock jointat the four corners of the core to main; tain the end and side sectionsin rectangular assemblage. From the shoulder flange 13 the plane 15rises to the top of line 16, formof the plane 15. The lateral gles toform the flange 17, overlying the I flanged corners of the plane 5 ofthe end section. The base line 11 of the side sectionsis flangedinwardly at 17 as at 9 on the end sections, and for the same purpose. Togive stability to the top of the core and prevent its collapsinginwardly, the top 18 is provided, the corners of the top are cut away asat 19 to clear the overlapping flanges of the end and side sections. The

plane of the top 18 is depressed below the edges to form the loops orgrooves 20 and 21, respectively engaging the upper edges of the planes 5and 15, holding the end and side sections in rigid assembly andpreventing distortion of the core at the top.

To prevent the collapsing inwardly of the end sections and the sidesections at the bottom, the insert 22 is provided, the edges 23 of whichare flanged downwardly to bear against the end sections and the sidesections respectively, when the insert is in position in the core. Theangle of the flanges 23 and 2 1 conform to the angle of the end planes 1and 10 and exert a wedging action when the insert is forced intoposition holding the lower portion of the core in rigid assembly. Forconvenience in handling the insert, the opening 25, is cut out of thecenter thereof.

For convenience in assembling the core, it is desirable to make up aform following the contour of the interior of the core between theplanes 11 of the end sections and the planes 10-10 of the side sections,this form having the outwardly curled edges 27 and 28. The sequence inassembling the core, is to place the end sections in position on theform within the curled edges 27, then insert the lower edges of theflames let on the side sections, within the loops on the end sectionsand slide the side section down until the flange 13 rests upon theshoulders 4 of the end sections; then place therover 18 in position andforce it downward so that its edges 20 and 21 engage the upper edges ofthe end and side sec-tions; then remove the core from the form 26 andinsert the retainer 22. The core is then in complete and self containedassembly, ready for placing in the mold to have the concrete mass flowedaround it.

When this concrete mass has set sufiicientl y to permit the removal ofthe mold therefrom the cores embedded in the concrete mass can beremoved by pressure on the top 18 forcing the whole assembly of the coreout of the mass of the concrete, or should the concrete mass have. setso as to bind the core 'it can be disassembled for removal.

This disassemb'ing of the core is accomplished by removing the retainer22, which permits the end sections to collapse in wardly disengagingfrom the flanged edges 1d of the side sections, which permits the endsections to be lifted out of the concrete mass disengaging from theedges 20 of the cover 18; with the end sections removed from the recess,the side sections can be similarly moved inward and removed from therecess, disengaging from the edges 21 of the cover. It is obvious thatno violent action is necessary in disassembling and re moving the corefrom the concrete mass, thus saving the concrete from vibration and jarlikely to interfere with its proper setting and form. The cores are soproportioned that the cover 18 projects into or through the mold so asto project above the surface of the concrete mass to prevent it becomingembedded therein for obvious reasons. To prevent lodgment of grout orflowing concrete into the top of the cover 18 while pouring into themold, the top may be covered by a suitable cap as indicated in dottedlines in Fig. 1. This, however, is not necessary to the properfunctioning of the core.

WVe do not wish to be understood as confining this invention to theparticular form and method of interlocking the several parts of theassembl as they must vary with the modifications in the contour andgeneral application of the core to meet particular conditions, manyvariations being possible within the spirit of this invention.

Havin thus described this invention, what we claim and desire to coverby Letters Patent is:

1. A core including interlocking side and end walls, said walls beingoffset to form a continuous horizontal shoulder around the core, aremovable top having grooves to receive the upper edges of the wallsand. a removable retaining member within said core engaging the walls.

2. A collapsible core having side and end walls, interlocking meansconnecting the meeting edges of said walls, the core being of a reducedsize adjacent its upper end, a top fitting within the core and havinggrooves to receive the upper edges of the walls and removable meanswithin the core to prevent collapsing thereof.

In testimony whereof, we have hereunto set our hands at Los Angeles,California, this 5th day of July, 1916.

EDGAR N. GOODLETT. JOHN B. GOODVVIN.

In presence of B. M. MURRAY, BALowtN' VALE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C,

